What could this be?

[ILS]

Hello,

I'm new on this site but wanted to stop in and see if I could get some help. I'm a bit lost as what could be happening with my orchid. I've only had orchids for about 8 months but never had any problems now all of a sudden I have two orchids not doing so well? I feel awful and would love to get them back to health.

One of the orchids started getting black specs on the leaves and black edges on the leaves. That was about a week ago and now the whole bottom of the leaves are white/silver. What could be causing this?

The other orchid (both dendrobiums) has the leaves turning yellow. It does not look like sunburn to me but to be honest I really dont have any experience.

Thank you in advance. Any suggestions appreciated

Orchid 1


http://i23.photobucket.com/albums/b3...idresized2.jpg

Orchid 2